Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0528d0228fcffeb…

MALICIOUS

PDF

39.0 KB Authoring application: Smallpdf Desktop
MD5: 7e4cb376109ef791e6f007186e232c20 SHA-1: 890f8bbc4e41361c7c656c470625afb07e6a0730 SHA-256: b0528d0228fcffebb339cb35548b8c236a88e9de748e08d3b7b3ad5d1e82dacd
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, a technique often used for SEO poisoning or to redirect users to malicious sites. ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall' further supports a phishing or malicious redirection intent. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' indicate the document's primary function is to distribute links to other potentially malicious content.

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://mikessportspage.com/uploads/1/3/0/2/130287997/kidirisog-xazujisuz.pdf
    • http://mingcamellia.com/uploads/1/3/0/2/130271143/verukaxudadon.pdf
    • http://consultoriasrojas.com/uploads/1/3/0/7/130776677/judubasuwegogu.pdf
    • http://moodlabnewlife.nl/uploads/1/3/0/5/130542982/130542982.html#accounting+information+systems+and+internal+control+vaassen+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00000ffb.bin
8c2be6614163fb5719664cfc345945670570f7eb23fe500dc6b1172c9b7716f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB 7836 bytes

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